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(No Model.)

H. A. LUTTGENS.

LOGOMOTIVE.

Patented Nov 4,1884...

WTHESSEE= Phalo-Llthographer, Washinmun. u c

STATES Unirnn Farierrr @rrrcn.

TO THE ROGERS LOGOMOTIVE AND MACHINE WVORKS, OF SAME PLACE.

LOCOMOTIVE.

SPECIFICATION forming part of Letters Patent No. 307,479, dated Novemberi, 1884:.

- Applicat'ou llllll March 15, 18:54. (No model.)

T0 ctZZ whom it may concern:

Be it known that I, HENRY A. Lurrenns, of Paterson, in the county ofPassaic, in the State of New Jersey, have invented a certain new anduseful Improvement in Locomotives, of which the following is aspecification.

The improvement relates to the construction of the forward portion. Ihave devised a construction whereby a bogie or truck is employed tosupport the front end at a point farther forward than usual withoutinvolving dilficulties or even rendering the appearance unsightly. Alarger proportion than usual of the weight of the boiler and generalstructure is devolved upon the driving'wheels at the mid-length andrear. I have also arranged in the extended barrel of the locomotive atubular device for imparting heat from the escaping gases to thefeed-water. This heater lies in the direct path of the gases. It iseasily accessible and removable for examination and repairs. Ihave alsodevised an improved construction of the firm union necessary between theboiler and the cylinders. It is important to take hold of a considerablelength of the boiler-shell. I

- do this by a series of narrow saddles, so as to of the central andprincipal saddle.

allow for the expansion and contraction of one part, while the otherbelow does not partake of such change of dimensions.

The following is a description of what I consider the best means ofcarrying out the inven tion.

The accompanying drawings form a part of this specification.

Figure 1 is a general side elevation. Fig. 2 is an outline showing therelations of certain parts in cross-section. Fig. 3 is avertical sectionthrough the center of the saddles. Fig. 4: is a corresponding horizontalsection. Fig. 5 is a front View of a portion of one of the saddles on alarger scale. Fig. 6 is an end view Fig. 7 is a plan view thereof. Fig.8 is an end view, and Fig. 9 is a plan view, of one of the auxiliarysaddles.

Similar letters of reference indicate like parts in all the figureswhere they occur.

A is the forward portion of the boiler proper, having the ordinaryfeatures-tubes, steamseparate saddles, M M M",

my invention is not framing B extends farther forward than usual,

and the truck supports the structure farther forward than usual. Thelong space over the framing Band truck Gis occupied byastrong andfirmly-bolted extension, \V, of the barrel of the boiler, connected tothe framing B by suitable braces, a a, and carrying the smokepipe Y onits forward end, which performs the usual functions of a smokebox. Itscentral and rear portions are formed with tubes and serve as awater-heater. A space immediately in rear of this extension \V is amixing-chamher, for the more complete combustion of the gases from thefurnace. (Not represented.)

It is necessary to have a firm union and to take hold on aconsiderablelength of the boiler. As I take hold by fastenings whichpierce the boiler, and any rocking of their fastenings would cause aleak, I have devised a series of a little distance apart, each rigidlysecured at the upper edge to the boiler and at the lower edge to thecrossbridge D, formed by the central extension of the cylinders D. Thecylinders are usually heated by the steam up to nearly the temperatureof the boiler. In such cases this part of of much importance; but itsometimes happens that the boiler is raised to its full workingtemperature before any steam is let into the cylinders, in which casethe cylinders remain nearly cold. Sometimes, on the other hand, afterworking and raising the temperature of all the parts, the bottom of theboiler may be cooled by active pumping in of cold water, while thecylinders remain hot. In either case my separate saddles can springapart at the top and bottom and avoid mischief.

Various modifications in the portions may be made by any good mechanicwithout departing from the principle or sacrificing the advantages ofthe invention; but I esteem it important that the cylinders be placedabout in the position shown, which is the usual position of thecylinders in American looomotivesthat is to say, fastened to the boilerimmediately in rear of the smoke-box,

forms and proor else to the smoke-box at a point immediately forward ofthe ordinary smoke-box or flue-sheet.

Some of the advantages due to the invention may be separatelyenumerated, as follows: First, by reason of the fact that the truck 0 isfar forward, I throw alarger proportion of the weight of the boiler andentire structure upon the driving-wheels, and thus'increase theiradhesion. By reason of the position of the cylinders in" rear of thetruck, I shorten the connections, and further relieve the truck andfurther load the driving-wheels, and by reasonof the extension W of theboiler-front I give a graceful appearance and very strongly brace theextended framing. Second, by reason of the fact that the saddles M M Mare in three separate casting's, with a little space between each andthe next, it follows that'I distribute the support along a considerablelength. Each saddle may be riveted with absolute tightness to the boil--er above, and bolted solidly to the cylinder arms D below, and thedifference, often very considerable, in the expansion by heat is allowedfor by the springing of the saddles, al- 25 lowing their upper edges toapproach and separate, while the lower edges are at a fixed distanceapart, or approach and separate to a less extent.

I claim as my invention- ,7 t v 1. In a locomotive, the truck 0,cylinder D, and the extension W of the boiler-front, combined andarranged as and for the purpose herein specified. p

2. In alocomotive having the cross-support 3 5 or saddle under theboiler proper, the duplicate or divided saddles, taking hold of theboiler along two ormore transverse lines, arranged to yield elastically,to allow for expansion and contraction, all substantially as hereinspeci- 40 fied.

HENRY A. LUTTGENs.

